brain

In 2005, Stanford scientist Karl Deisseroth discovered how to switch individual brain cells on and off by using light in a technique he dubbed 'optogenetics'.

Research teams around the world have since used this technique to study brain cells, heart cells, stem cells and others regulated by electrical signals.

However, light-sensitive proteins were efficient at switching cells on but proved less effective at turning them off.

Now, after almost a decade of research, scientists have been able to shut down the neurons as well as activate them.

Dock Street Walker (7.2% ABV) is an American Pale Stout, brewed with substantial amounts of malted wheat, oats, and flaked barley for a smooth, creamy mouthfeel. Fuggle hops provide delicate, earthy notes, while the cranberries create a sinister, bloody hue, and a slight tartness. The pre-sparge-brain-addition provides this beer with intriguing, subtle smoke notes. In true walker fashion, don't be surprised if its head doesn't hang around forever.